Our ergonomic saddle stool is designed to effectively distribute your weight more evenly, raising your hips above your knees to help alleviate pressure and pain in your back and spine. Seat Cushion: The comfortable and thick seat cushion ensures long-lasting comfort, unlike other thin saddle chair. The craftsmanship of the back of the cushion is perfect and unlike rough saddle stools, it prolongs the usability of the saddle stool. Cylinder: The cylinder is double certified by SGS and TUV, with a weight capacity of up to 350-450 LBS.We have also added an iron piece between the cylinder and the seat cushion to further ensure your safety. Base: The aluminum alloy base is more lightweight and sturdy compared to common plastic or other bases. Wheels: These are some of the most classic wheels, stable, silent, smooth, and scratch-resistant even after long-term use on any floor surface. Our saddle stool with back is widely applicable for dental, salon, aesthetics, kitchen, massage, lash work, etc.It rotates 360 degrees and has an adjustable height range of 20-28 inches. At Grace&Grace, we pay attention to every detail. As a top manufacturer specializing in high-end office and home furniture, our products have been exported to the USA, Europe, Japan, and Australia for decades, enjoying a good reputation. Please contact us through Amazon or our after-sales email with any questions.